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Unformatted text preview: ents are periodically taken at four different locations on the window. 15 subgroups
were observed and each subgroup consists of the four thickness measurements taken across
the windows at a particular time with the following results: mean of the means =
and the average range of 8.85.
Calculate the center line for the Xbar chart.
A. 50.05
B. 8.85
C. 4.12
D. 3.34 = 50.05 AACSB: Analytic
Bloom's: Application
Difficulty: Easy
Learning Objective: 4
Topic: Xbar Control Charts 118. A manufacturer of windows produces one type that has a plastic coating. The
specification limits for the plastic coating are 30 and 70. From time to time the plastic coating
can become uneven. Therefore, in order to keep the coating as even as possible, thickness
measurements are periodically taken at four different locations on the window. 15 subgroups
were observed and each subgroup consists of the four thickness measurements taken across
the windows at a particular time with the following results: mean of the means =
= 50.05
and the average range of 8.85.
Calculate the center line for the R chart.
A. 50.05
B. 8.85
C. 2.21
D. 0.59 AACSB: Analytic
Bloom's: Application
Difficulty: Easy
Learning Objective: 4
Topic: Range Control Charts 11754 Chapter 01  An Introduction to Business Statistics 119. A manufacturer of windows produces one type that has a plastic coating. The
specification limits for the plastic coating are 30 and 70. From time to time the plastic coating
can become uneven. Therefore, in order to keep the coating as even as possible, thickness
measurements are periodically taken at four different locations on the window. 15 subgroups
were observed and each subgroup consists of the four thickness measurements taken across
the windows at a particular time with the following results: mean of the means =
and the average range of 8.85.
Calculate the control limits for the Xbar chart.
A. (41.2 58.9)
B. (48.1 52.0)
C. (43.6 56.5)
D. (29.9 70.2)
LCL = 43.60 UCL = 56.50
50.05 ± (0.729)(8.85) = 43.60, 56.50 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 4
Topic: Xbar Control Charts 11755 = 50.05 Chapter 01  An Introduction to Business Statistics 120. A manufacturer of windows produces one type that has a plastic coating. The
specification limits for the plastic coating are 30 and 70. From time to time the plastic coating
can become uneven. Therefore, in order to keep the coating as even as possible, thickness
measurements are periodically taken at four different locations on the window. 15 subgroups
were observed and each subgroup consists of the four thickness measurements taken across
the windows at a particular time with the following results: mean of the means =
= 50.05
and the average range of 8.85.
Calculate the control limits for the R chart.
A. (3.07 14.63)
B. (6.57 11.13)
C. (0 35.40)
D. (0 20.20)
LCL = DNE UCL = 20.20
(2.282)(8.85) = 20.20 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 4
Topic: Range Control Charts 11756 Chapter 01  An Introduction to Business Statistics 121. A manufacturer of windows produces one type that has a plastic coating. The
specification limits for the plastic coating are 30 and 70. From time to time the plastic coating
can become uneven. Therefore, in order to keep the coating as even as possible, thickness
measurements are periodically taken at four different locations on the window. 15 subgroups
were observed and each subgroup consists of the four thickness measurements taken across
the windows at a particular time with the following results: mean of the means =
= 50.05
and the average range of 8.85.
Assuming that the process is in statistical control, calculate the natural tolerance limits for the
process.
A. (45.75 54.35)
B. (37.16 62.94)
C. (42.40 57.70)
D. (47.50 52.60)
37.16, 62.94
50.05 ± 3(8.85/2.059) = 37.16 to 62.94 AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 6
Topic: Process capability 122. A manufacturer of windows produces one type that has a plastic coating. The
specification limits for the plastic coating are 30 and 70. From time to time the plastic coating
can become uneven. Therefore, in order to keep the coating as even as possible, thickness
measurements are periodically taken at four different locations on the window. 15 subgroups
were observed and each subgroup consists of the four thickness measurements taken across
the windows at a particular time with the following results: mean of the means =
and the average range of 8.85.
Is the process capable of meeting the specifications?
A. Yes
B. No = 50.05 Yes, the process is capable because the natural tolerance limits are within the specifications. AACSB: Analytic
Bloom's: Comprehension
Difficulty: Medium
Learning Objective: 6
Topic: Process capability 11757 Chapter 01  An Introduction to Business Statistics 123. A manufacturer of windows produces one type that has a plastic coating. The
specification limits for the plastic coating are 30 and 70. From time to time the plastic coating
can become uneven. Therefore, in order to keep the coating as even as possibl...
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 Winter '14

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